This will probably come across as far more snobby and elitist than it is intended to:
A fairly common lack of understanding that there's a real difference between having an opinion about something and actually knowing something, which ties into the following:
People on GAG are a veritable treasure trove of cliche opinions on feminism (whether good, evil, or neither) which are as embarrassingly superficial as the never ending stream of penis size questions. This holds true even when the opinion is coming from a poster who is otherwise consistently thoughtful, articulate, and interesting. Discussions on Islam and socialism suffer in the same way.
People typing about cliche answers apparently oblivious to the fact that they're giving a cliche answer (and not the pearl of wisdom they presumably think it is). This is most apparent to me when the discussion is about sexual matters.
I feel like when people on GAG discuss politics, they don't care about the politics so much as playing a performative role as a "liberal" "conservative" "Democrat" "Republican" or whichever other political identity they want to have for themselves and perhaps more importantly the identity they want others to see them as having.
That said, as for opinions, seemingly, girls on GAG are much more consistently "liberal" than off of it and guys are seemingly somewhat less consistently "conservative" on GAG than off of it. I'm not sure why.
On a brighter note, there is a wholesale lack of pettiminded bitchiness about grammar (Don't get me wrong; grammar is very, very important but on a social media site, there is no good reason to get bitchy about it).